BlenderMCP

Instructions

Implementation Reference

• src/blender_mcp/server.py:269-295 (handler)

  The get_polyhaven_categories function is registered as an MCP tool and handles the retrieval of categories from Polyhaven by communicating with a Blender instance.

  @mcp.tool()
  def get_polyhaven_categories(ctx: Context, asset_type: str = "hdris") -> str:
      """
      Get a list of categories for a specific asset type on Polyhaven.
      
      Parameters:
      - asset_type: The type of asset to get categories for (hdris, textures, models, all)
      """
      try:
          blender = get_blender_connection()
          # Check PolyHaven status directly
          status = blender.send_command("get_polyhaven_status")
          if not status.get("enabled", False):
              return "PolyHaven integration is disabled. Select it in the sidebar in BlenderMCP, then run it again."
          result = blender.send_command("get_polyhaven_categories", {"asset_type": asset_type})
          
          if "error" in result:
              return f"Error: {result['error']}"
          
          # Format the categories in a more readable way
          categories = result["categories"]
          formatted_output = f"Categories for {asset_type}:\n\n"
          
          # Sort categories by count (descending)
          sorted_categories = sorted(categories.items(), key=lambda x: x[1], reverse=True)
          
          for category, count in sorted_categories: